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Certified Pre-Owned Watch Program

Serviced Vintage Omega SeaMaster Chronograph Cal 321 Watch CK 2947 Box & Papers

Regular price $9,999.99

Only 1 in stock

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From OMEGA’s beginnings, our timepieces have recorded some of the most significant moments in the world (and beyond). They have been worn by presidents and kings, astronauts and spies, movie stars and you. Behind each one is a legacy of horological quality and innovation.


Omega Caliber 321

The Omega Caliber 321 chronograph movement is a thing of legend. After all, it has been to the Moon, the iconic Speedmaster wasn’t the only Omega chronograph made in the 1960s to utilize this high grade manually wound unit. It also found its way into the considerably less common, one might even say rare, Seamaster chronographs from the same era. The Seamaster line was, at the time, the more stylish alternative – more about the looks than about its technical capabilities. But with the addition of the Caliber 321 it was no less proficient a timing tool.

Launched in 1948 to coincide with the brand’s 100th anniversary, the Omega Seamaster line is the oldest in the current collection. Loosely based on the waterproof wristwatches made for the British military at the end of World War II, the Seamaster was first intended as a robust yet elegant watch for active individuals who wanted a watch for town, sea and country.

The Seamaster’s first diving-record was achieved in 1955, when diver Gordon McLean reached a depth of 62.5 meters in Australia. The key to these watches was the O-ring rubber gasket. At this time, water-resistant watches generally used lead or shellac gaskets which were susceptible to temperature changes. The engineers at OMEGA were so sure of the Seamaster that one flew the Polar Route over the North Atlantic attached to the outside of a Douglas DC6 aircraft in 1956.

I consider the Seamaster two lines in one: the big, heavy Professional, designed for divers for deep diving, and a dress range also made by Seamaster.  Omega was founded in 1848 by Louis Brandt at the age of 23. The brand’s reputation grew fast and in 1895 the watches achieved a precision of 30 seconds a day.

By the turn of the 19th century Omega was one of Switzerland’s largest watch companies with 240,000 watches produced annually and employing 800 people. Omega made its debut in sports during the Gordon Bennett international ballooning Cup in 1917; since then Omega has gone on to be the official timekeeper at 21 Olympic Games. In 1936 Omega set the remarkable World precision record of 97.8 points at the Kew-Teddington observatory in England.

In 1957, with motorsport in mind, Omega launched the Speedmaster, which in 1965 was chosen by NASA as its official chronometer in Space. Four years later the Moonwatch was the first watch to be worn on the Moon, when on 21st July 1969 Neil Armstrong made his giant leap for mankind. Currently Omega belongs to the Swatch Group. The Omega cal. 321 movement was in production for roughly only 11 years. The production of this specific movement was cost prohibitive. Making this piece, from a horological perspective, that much more limited and ultimately rare altogether due to lower production numbers.


This is a beauty. It is very rare to find a watch this old with original box and papers. Defiantly a collector watch, Omega 321 Movement is the most sought after watches as it is know for it famous moon landing. Please look at all the pictures, as they are part of the description. The watch is working, Serviced, and keeping great time. This is a highly collectible watch. Very few left with this rare movement. Sure, to increase in value overtime, and a great addition to your collection. The condition of the watch is the same as it appears in the photos.   The watch is working and is part of our new Certified Pre-Owned CPO. Contact me if you have any questions first.





Stainless Steel Case and Case Back.

Case Size

≈ 35,00 mm without the crown and  ≈ 43,50 Lug to Lug, Thickness: ≈12,00 mm

Case Back

Stainless steel cover signed. Snap on. Front writing Seamaster Waterproof. Inside Writing  Omega Watch Co Fab Suisse Swiss Made  Acier Inoxydable CK2947/1


Signed with famous Omega logo


Acrylic Some Scratches, and mark between 6 and 7.




CRÈME DIAL - Under U.V. light inspection shows Luminous hands (low lum) &  no lum on indices dial, Swiss made Mark, with three register chronograph . Shows light patina Please see picture for more detail.


Seconds, Chronograph, Tachymeter.


Manual-winding Omega famous Cal. 321 movement.

It can also be found in the Omega Speedmaster Professional or "Moonwatch." 

After serviced I was told by the repair center this movement looks and function great. He "stated looks like new". One of the best 321 he has seen as far as being taken care of.

Movement Notes

Just inspected and in great shape. Fully Serviced and Overhauled. (Service Cost $850) Come with a Service Warranty!  Please see pictures and as some old movements don't have a very clear marking. Movement is running. Keeps great time see below time testing.


 New OEM Omega bracelet  (this is not orginal to the watch)

 Lug Size: 18mm      Please see picture.


Omega Box very Rare & Papers (with warranty info filled out) with actual Omega tissue ( I have never seen that). 

Looks great, The box is vintage condition and has tears on it see picture, the hinge can be pulled out if not careful with the box.

Reference #

CK 2947 /1 315.164

Made in


Water Resistance

No. Please pressure test before water use.

Service Level

1   2/14/2018    (Please see Tab below for details) 

Timing Test **

-3 s/day  In-House Time Test Results (See Service Level Tab)**

Certified Pre-Owned

Passed 25-point inspection. Please see tab below for details.


3-Month Service Warranty (Please see Tab below for details)


All watch functions tested and operable. Circa Watch serial made in late 1959.  This watch was sold on 12/24//1962 from Corona Del Mar California to a person in Costa Mesa Ca not to far from my old high school



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